Question

factorise ab*2+(a-1) b-1​

Answer 1

Answer:

Step-by-step explanation:

ab² + (a-1)b-1 =0

ab² + ab -b -1 = 0

ab² -b +ab -1 =0

b ( ab -1) +1(ab-1) =0

(ab-1) (b+1) =0

b= -1 , a = -1